I'm just finishing my cheap DIY chlorine injection build and began running tests. I filled my tank with 10.5% chlorine and now realize my norprene pickup tube is floating to the top. How have y'all addressed this so that the pickup line doesn't float and suck air? I have some PVC and CPVC pipe laying around that I could affix to my hose so that it sinks, but, I am weary of potential cross reactivity with the undiluted chlorine bleach.